Stem for a bicycle handlebar



FIG. 1 is a side elevational view of a stem for a bicycle handlebar showing by new design, the opposite side being a mirror image thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof. 

The ornamental design for a stem for a bicycle handlebar, as shown and described. 